SM radar
| SM (No. 10) aboard USS Lexington | |
| Country of origin | United States | 
|---|---|
| Manufacturer | General Electric | 
| Introduced | 1943 | 
| No. built | 23 | 
| Type | Fighter-direction radar | 
| Frequency | A/G-band | 
| PRF | 775–825 Hz | 
| Pulsewidth | 1 μs | 
| Range | 35 mi (30.4 nmi) | 
| Precision | 200 yd (0.1 nmi), 3 ° | 
| Power | 45–65 kW | 
SM was an American made fighter-direction radar used for the ship ground-controlled interception (GCI) during World War II by the United States Navy. Variation included the SM-1.